"I got lambasted by the Coast Guard and NOAA when we said there was undersea oil," USF marine sciences dean William Hogarth said. Some officials even told him to retract USF's public announcement, he said, comparing it to being "beat up" by federal officials.

The USF scientists weren't alone. Vernon Asper, an oceanographer at the University of Southern Mississippi, was part of a similar effort that met with a similar reaction. "We expected that NOAA would be pleased because we found something very, very interesting," Asper said. "NOAA instead responded by trying to discredit us. It was just a shock to us."

NOAA Administrator Jane Lubchenco, in comments she made to reporters in May, expressed strong skepticism about the existence of undersea oil plumes — as did BP's then-CEO, Tony Hayward.

"She basically called us inept idiots," Asper said. "We took that very personally."